package com.servlet.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class UserFilter implements Filter {
	private FilterConfig config;

	@Override
	public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)
			throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest) arg0;
		HttpServletResponse response = (HttpServletResponse) arg1;
		HttpSession session = request.getSession();
		request.setCharacterEncoding("UTF-8");
		response.setCharacterEncoding("UTF-8");
		response.setContentType("text/html;charset=UTF-8");
		String nofilter =  config.getInitParameter("nofilter");
		if(nofilter !=null){
			String[] strarry = nofilter.split(";");
			for(int i=0;i<strarry.length;i++){
				
				if(request.getRequestURI().indexOf(strarry[i]) !=-1){
					arg2.doFilter(arg0, arg1);
					return;
				}
			}
		}
		
		if(session.getAttribute("username") !=null){
			System.out.println("...........");
			arg2.doFilter(arg0, arg1);
		}else{
			request.getRequestDispatcher("index.jsp").forward(arg0, arg1);
			System.out.println("+++++++++++++");
		}
					
	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {
		config = arg0;

	}

	@Override
	public void destroy() {
		
		
	}

}
